What does the '040' in the part number signify?

The '040' indicates that these main bearings are 0.040 inches undersize. This is a specific size for engine rebuilding, often used when the crankshaft journals have been machined down to correct for wear or damage.

What type of engines is this bearing set designed for?

This set is made for GM Vortec and LS-series Gen III and IV engines. This includes popular displacements like the 4.8L, 5.3L, 5.7L, and 6.0L engines found in many Chevrolet, Cadillac, and other GM vehicles.

Are these bearings environmentally safe?

Yes, these bearings feature a lead-free composite construction, making them an environmentally safe option for your engine build.

Specifications

Brand: King Engine Bearings
Part #: MB5293SI 040

King GM 294/325/345/364CI 4.8/5.3/5.7/6.0L L20/LS1/LS2/LS4/LS6 (Size 040) Main Bearing Set

Name: King GM 294/325/345/364CI 4.8/5.3/5.7/6.0L L20/LS1/LS2/LS4/LS6 (Size 040) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-gm-294-325-345-364ci-4-8-5-3-5-7-6-0l-l20-ls1-ls2-ls4--t14-711651
Price: 62.69 USD
Availability: BackOrder

$62.69

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King Engine Bearings main bearing set MB5293SI 040. Features lead-free composite and bi-metal aluminum for medium-load engines.

Key Features

This product is a King Engine Bearings main bearing set, part number MB5293SI 040.
The set includes bearings sized 0.040 inches undersize.
Constructed with a bi-metal aluminum material for durability.
Features a lead-free composite for environmentally safe operation.
Suitable for medium-load engines.
Designed for GM Vortec and LS-series Gen III and IV engines.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This is a King Engine Bearings main bearing set, specifically the MB5293SI 040. You get a complete set of main bearings designed for GM Vortec and LS-series Gen III and IV engines. These bearings are built with a bi-metal aluminum material and feature a lead-free composite, making them a solid choice for medium-load applications.

King has been specializing in engine bearings since 1960, focusing on supplying well-built components. This particular set is sized 0.040 inches undersize, which is important to note for your engine build. They are designed to handle the demands of engines like the 4.8L, 5.3L, 5.7L, and 6.0L found in a wide range of GM vehicles.